Preserving-jar.



No. 746,496.` l PATENTBD DEG. s, 1903. J. M." GRAU.

PRBSERVING JAB..

l APPLIoATIoN FILED APB. 23. 1903.

No' MODEL.

UNITED STATES Patented December 8, 1903.

PATENT OFFICE.

PRES ERVlNG-JAR.

SPECIFICATION forming part of Letters Patent No. 746,496, dated December 8, 1.903.

To all whom it may concern:

Be it known that I, JOHN M. GRAU, acitizen of the United States, residing at Philadelphia; county of Philadelphia, and State of Pennsylvania, have invented a certain new and use-4 fulImprovement in Preserving-Jars, of which the following is a specification.

My invention relates Vto a new and useful improvement in preservingjars, and has for its principal object to provide a jar with a cover fitting hermetically within the mouth of the jar and being forced downward by screwpressure, and the same screw used for forcing the cover downward is utilized for raising the cover before the same is entirely removed from the jar.

With these ends in view this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, the construction and operation will now be described in detail, referring to the accompanying drawings, forming apart of this specification, in which- Figure l is a vertical sectional view ofthe upper portion of the jar, with my improvement applied thereto; Fig. 2, a plan view of the mouth of thejar; Fig. 3, a plan view of the cover; Fig. 4, a plan view of the disk whereby the screw is attached to the cover; Fig. 5, a section taken on the line 5 5 of Fig. 3; Fig. 6, a perspective view of one end of the clamp; Fig. 7, a vertical section through the upper portion of afjar, showing my improvement applied thereto in a modified form.

A represents the jar, the mouth of which is provided with an internal annular beveled surface A, upon which the rubber packing B is adapted to t.

C is the cover adapted to fit within the mouth of the jar, and this cover is provided Application iiled April 23, 1903. Serial No. 153,940. (No model.)

C', and one of these extensions communicateV with one end of one of the undercut grooves D and the other extension communicates with one endof the other undercut groove, the otherends of the grooves being closed, as shown in Fig. 3.

E is a diskprovided upon opposite sides with wings E', said wings being of such a size as to pass downward through the extensions C2 of the cavity C', and then by turning the disk the wings E will pass into the undercut grooves D, and thus the disk will be locked to the cover so it cannot be removed' therefrom until the wings are again brought in register with the extension C2.

F is a screw swiveled .to the disk E, and this screw is threaded through a clamp G, which clamp passes over about the mouth of the jar and down upon each side, and its ends are bent inward and adapted to `lie within an annular groove H, formed around the outside of theneck of the jar. Cut-away portions I are formed upon opposite sides of the jar, communicating with the groove H, whereby the clamp G may be attached to the jar by passing the ends of the clamp downward through the cnt-away portion or notches I and then turning the clamp so that its ends are in the groove H.

F is a thumbhold upon the upper end of the screw F for turning the same.

It will thus be seen that to secure the cover in place the cover is placed in the mouth of the jar at the same time as the clamp is passed downward through the openings I, and then after the clampis turned so that its ends Awill enter the groove H the screw F is turned so that the cover C will be forced downward tightly upon 'the packing B, forming an airtight closure, and after the contents of the jar has cooled a partial vacuum will ble formed, asV is well known, and the cover will be also heldin its place by this means.

I am aware that jars have been patented and manufactured in which the cover has been forced downward by either clamp or screw pressure; but in all such forms of jars it is extremely diflicult to disengage the cover from the jar when it is desired to open the same, as the cover becomes cemented into the jar by the syrup from the preserves and also ICO held by the partial vacuum formed by the cooling of the contents of thejar. In my improved jar when the same is about to be opened the screw is turned in the reversed direction, and in passing upward through the clamp it will draw upward upon the cover and disengage the same from its seat, and then by turning the clamp until the ends of the same 'register with the openings I the cover and clamp may be raised togetheinww In Fig. 7 I have shown a modified construction embodying the same principle as described, but so formed that the screw and thumb-piece of the same will lie below the top line of the clamp, so that the jar may be more easily packed for shipment and may be caused to rest upside down, if so desired.

Of course I do not wish to be limited to the exact construction here shown, as slight modifications could be made without departing from the spirit of my inventionas, for instance, other means could be employed for securing the screw to the cover. The means I have shown in the drawings is probably the most practical, as all parts may be removed for cleansing and may be yeasily and quickly inserted in place, or other devices could be used, if desired.

.fit within the mouth of the jar and seat within Y the same upon suitable packing, a removable clamp extending above and across the mouth of thejar, the ends of the clamp being turned down and inward, the jar being provided with an annular groove formed around the eXterior of the same in which the ends of the clamps are adapted to normally rest, cutaway portions formed upon opposite sides on the outside of the jar communicating with and extending upward from the annular groove through which the clamp may be removed, a thumb-screw threaded through the clamp, means for securing and swiveling the lower ends of the screw to the cover, as and for the purpose specified.

2. In a preserving-jar, an interior annular beveled surface formed in the mouth of the jar, a cover adapted to it within the mouth of the jar and provided with an exterior an-V nular beveled surface, a packing interposed between the two beveled surfaces, a clamp extending above and across the mouth of the jar, the ends of the clamp being turned downward and then inward, an external annular groove formed in the neck of the jar in which the ends of the clamp are adapted to normally lie, cut-away portions upon opposite sides of the jar whereby the clamp may be removed, a thumb screw threaded through the clamp, a disk to which the lower end of the thumb-screw is swiveled, and means for removably securing said disk to the cover, as and for the purpose specified.

3. In a preserving-jar, an annular beveled seat formed within the mouth of the jar, a cover adapted to fit within the mouth of the jar, a packing interposed between the seat and the cover, a clamp passing across and above the mouth of the jar, the ends of said clamp bending downward and then inward, an external annular groove formed around the neck of the jar in which the ends of the clamp rest, cut-away portions upon opposite sides of the jar extending upward from the annulargroove, a thumb-screw threaded through the clamp, the cover provided with a cavity upon its upper face, undercut grooves upon opposite sides of the cavity and communicating with the same extensions of the cavity upon opposite sides, one extension communicating with one end of one groove, and the other extension communicating with one end of the other groove, a disk to which the lower end of the thumb-screw is swiveled in the center, wings formed with said disk, said disk adapted to pass downward into the cavity of the cover, the wings adapted to pass through the extensions of the cavity and then enter the undercut grooves by the turning of the disk whereby said disk is secured to the cover, as and for the purpose specified.

In testimony whereof I have hereunto aixed my signature in the presence of two subscribing witnesses.

JOHN M. GRAU. Witnesses:

MARY E. HAMER, L. W. MORRISON. 

